Pak. J. Bot., 48(6): 2243-2248, 2016.

COMPARATIVE EFFICIENCY OF HIGH (TRIPLE SUPER PHOSPHATE) AND LOW (ROCK PHOSPHATE) GRADE P NUTRITION SOURCE ENRICHED WITH

ORGANIC AMENDMENT IN MAIZE CROP

NOOR-US-SABAH^1*, GHULAM SARWAR¹, MUKKRAM ALI TAHIR¹AND SHER MUHAMMAD²

¹Department Soil and Environmental Sciences, UCA, University of Sargodha, Pakistan

²National Institute of Organic Agriculture, Islamabad, Pakistan

^*Corresponding author’s email: soilscientist.uca@gmail.com

Abstract

Pakistan falls under arid to semi-arid climate and therefore, Pakistani soils are sufferer of phosphorus deficiency. Costly phosphatic commercial fertilizers and their unavailability at the time of crop demand is the burning issue in Pakistan. Under such circumstances, use of locally available rock phosphate (RP) grasps the interest of researchers now a day. Pakistan has blessed with considerable quantity of cheaper low grade RP in Abbottabad and Hazara districts of KPK province. Due to this scenario, a pot experiment was carried out to evaluate growth efficiency of maize crop by adding organic manure fortified with RP in comparison with TSP in normal soil (pH_s= 8.15, EC_e= 1.28 dSm^-1, SAR = 4.77 mmol L^-1, saturation percentage = 29% and sandy clay loam texture). The study was comprised of 7 treatments replicated three times including: T1 = Control (0 P); T2 = Recommended NK + organic material; T3 = Recommended NK + RRP; T4 = Recommended NK + RRP + OM; T5 = Recommended NK + TSP; T6 = Recommended NK + TSP + OM and T7 = N + K + TSP + ½ Organic manure. It was concluded that integrated use of organic amendment with RP (Local Hazara Red Rock Phosphate) and TSP proved superior as compared to their sole use on maize crop growth. A significant increase in available P concentration of the growth medium was observed due to addition of organic material along with TSP as a source of P. Addition of organic material also enhanced the soil carbon level as compared to control. It can be concluded that rock phosphate (RP) could be an effective and economic substitution for TSP when it is integrated with suitable organic amendment with specific size.

Key words: Rock phosphate, Triple super phosphate, Maize, Organic amendment.

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			Updated: 22-12-16
	COMPARATIVE EFFICIENCY OF HIGH (TRIPLE SUPER PHOSPHATE) AND LOW (ROCK PHOSPHATE) GRADE P NUTRITION SOURCE ENRICHED WITH ORGANIC AMENDMENT IN MAIZE CROP *NOOR-US-SABAH^1, GHULAM SARWAR¹, MUKKRAM ALI TAHIR¹AND SHER MUHAMMAD²** ¹Department Soil and Environmental Sciences, UCA, University of Sargodha, Pakistan ²National Institute of Organic Agriculture, Islamabad, Pakistan ^Corresponding author’s email: soilscientist.uca@gmail.com* Abstract Pakistan falls under arid to semi-arid climate and therefore, Pakistani soils are sufferer of phosphorus deficiency. Costly phosphatic commercial fertilizers and their unavailability at the time of crop demand is the burning issue in Pakistan. Under such circumstances, use of locally available rock phosphate (RP) grasps the interest of researchers now a day. Pakistan has blessed with considerable quantity of cheaper low grade RP in Abbottabad and Hazara districts of KPK province. Due to this scenario, a pot experiment was carried out to evaluate growth efficiency of maize crop by adding organic manure fortified with RP in comparison with TSP in normal soil (pH_s= 8.15, EC_e= 1.28 dSm^-1, SAR = 4.77 mmol L^-1, saturation percentage = 29% and sandy clay loam texture). The study was comprised of 7 treatments replicated three times including: T1 = Control (0 P); T2 = Recommended NK + organic material; T3 = Recommended NK + RRP; T4 = Recommended NK + RRP + OM; T5 = Recommended NK + TSP; T6 = Recommended NK + TSP + OM and T7 = N + K + TSP + ½ Organic manure. It was concluded that integrated use of organic amendment with RP (Local Hazara Red Rock Phosphate) and TSP proved superior as compared to their sole use on maize crop growth. A significant increase in available P concentration of the growth medium was observed due to addition of organic material along with TSP as a source of P. Addition of organic material also enhanced the soil carbon level as compared to control. It can be concluded that rock phosphate (RP) could be an effective and economic substitution for TSP when it is integrated with suitable organic amendment with specific size. Key words: Rock phosphate, Triple super phosphate, Maize, Organic amendment.

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